Isotope labelled 1-(5-Fluoropentyl)-N-tricyclo[3.3.1.13,7]dec-1-yl-1H-indole-3-carboxamide is a designer drug found within herbal blends which features a synthetic cannabinoid and adamantylcarboxamide group. The addition of the adamantylcarboxamide group was found to increase affinity for the peripheral CB2 receptor.